Article
Chemistry, Physical
S. Das, M. Lange, A. Cacciuto
Summary: In this paper, a simple model of active colloidal folders is introduced and numerically simulated to investigate the design and reconfigurability of two-dimensional folded structures using active forces. The study reveals the direct correspondence between the sequence of active forces and the structure of folded conformations, as well as the existence of highly mobile compact structures capable of moving between conformations.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Qianqian Wang, Dongdong Jin
Summary: Colloidal microswarms have gained increasing attention due to their unique capabilities in complex tasks and their ability to exhibit equilibrium and non-equilibrium collective states. Recent studies have focused on their response to external fields, interactions between building blocks, and interactions with the environment. Understanding the behavior of building blocks in collective systems is crucial for designing autonomous and intelligent microswarm systems for practical applications. Colloidal microswarms are expected to have a significant impact on small-scale active delivery and manipulation applications.
Article
Physics, Fluids & Plasmas
Hidde D. Vuijk, Sophie Klempahn, Holger Merlitz, Jens-Uwe Sommer, Abhinav Sharma
Summary: The study focuses on the behavior of an active colloidal dimer consisting of two active Brownian particles in an activity gradient, showing chemotactic and antichemotactic behavior depending on the relative orientation of the two particles. The research has implications for designing autonomous active colloidal structures that adjust their motion based on local activity gradients.
Article
Multidisciplinary Sciences
Nicola Pellicciotta, Matteo Paoluzzi, Dario Buonomo, Giacomo Frangipane, Luca Angelani, Roberto Di Leonardo
Summary: By modulating bacterial motility with light, researchers have found a way to control the transport direction and speed of microscopic particles by adjusting the active pressure gradients. This discovery provides new insights into the potential use of active pressure for controlled transport of microscopic objects.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Fluids & Plasmas
Effran Mirzad Rafael, Luca Tonti, Fabian A. Garcia Daza, Alessandro Patti
Summary: By conducting dynamic Monte Carlo simulations, the microrheology of isotropic suspensions of hard-core colloidal cuboids is investigated. The local viscoelastic behavior of these fluids is inferred by studying the dynamics of a probe spherical particle that is incorporated in the host phase and dragged by an external force. Different responses are observed by tuning the geometry of cuboids and system density, and are quantified by measuring the effective friction perceived by the probe particle.
Article
Chemistry, Physical
Xiufeng Li, Jasper van der Gucht, Philipp Erni, Renko de Vries
Summary: Protein condensates resulting from liquid-liquid phase separation have been studied as bioadhesives and coating materials, and more recently as models for membraneless organelles in cells. This study demonstrates how colloidal probe atomic force microscopy can be used to investigate the interfacial mechanics and dynamic rheological properties of micro-scale protein condensates. The research findings reveal three characteristic frequency domains for the mechanics of micro-scale protein condensates, providing insight into their behavior in biology and technological applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Keara T. Saud, Michael J. Solomon
Summary: The experiment investigates the interactions between active colloidal particles and the microstructure of a quasi-2D colloidal crystal monolayer. The results show that active particles have a significant impact on the void properties and microdynamics of the crystal lattice. The concentration of active particles is enriched in the void and void-adjacent regions, where the dynamics of active particles are most affected.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Physics, Multidisciplinary
Fu-Jun Lin, Jing-Jing Liao, Bao-Quan Ai
Summary: The crystallization dynamics of chiral active colloids were numerically explored. It was observed that chiral colloids with large angular velocity could be localized by self-trapping, promoting the formation of hexagonal crystal structures. The competition between chirality and coupling strength resulted in a transition between liquid and solid regimes. With increasing chirality, the transition points shifted greatly towards the weak coupling region. The hexagonal structure appeared to be more tenacious and difficult to melt, leading to a shrinking solid-liquid coexistence region in the phase diagram. In the low rotational speed region, the system exhibited global ordering but experienced significant diffusion, resulting in structural ordering before dynamical freezing.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Chemistry, Physical
Longfei Li, Wenjian Li, Ke Chen, Ning Zheng, Mingcheng Yang
Summary: This study focuses on the migration behavior of active colloidal cells (ACCs) on a substrate with mechanical inhomogeneities. The ACCs can migrate unidirectionally across the interface of a heterogeneous environment and exhibit tactical behavior, which is qualitatively different from the behavior of the constituent active particles themselves. The findings provide insights into understanding the taxis of biological cells and designing biomimetic cells with environment-sensitive capabilities.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Joscha Mecke, Yongxiang Gao, Carlos A. Ramirez Medina, Dirk G. A. L. Aarts, Gerhard Gompper, Marisol Ripoll
Summary: This article reports the simultaneous occurrence and relation of two seemingly separate phenomena: active turbulence and odd viscosity, in a chiral active fluid composed of standing and spinning colloidal rods and in simulations for synchronously rotating hard discs in a hydrodynamic explicit solvent.
COMMUNICATIONS PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yuming Zhang, Yiqian Wang, Yifan Su, Shuyu Fan, Mingjiang Dai, Songsheng Lin, TongchunKuang, Qian Shi
Summary: The pretreatment process of microdrills was optimized to reduce the negative impact of Co on cemented carbide tools during diamond coating deposition. The surface morphologies and Co content of the microdrills were investigated, and the influence of the pretreatment on fracture toughness and coating adhesion was evaluated. The results showed that the acid and Murakami etching processes damaged the surface microstructure and fracture load of the microdrills. The optimized three-step process improved pretreatment efficiency and coating adhesion without significantly reducing the fracture load of the microdrills.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Audrey Nsamela, Aidee Itandehui Garcia Zintzun, Thomas D. Montenegro-Johnson, Juliane Simmchen
Summary: This article reviews the recent development of biomimicking behaviors in active colloids, focusing on the swimming mechanisms and mechanosensory response parameters of both biological and artificial microswimmers. The comparison of these two classes of microswimmers provides analogies in terms of fuel dependence, interaction with boundaries, and stimuli-induced motion.
Article
Nanoscience & Nanotechnology
Zixin Wang, Wei Wang, Max Wamsley, Dongmao Zhang, Hui Wang
Summary: Polydopamine (PDA) is a unique bioinspired synthetic polymer with broad light absorption, efficient photothermal conversion, and versatile surface adhesion. By utilizing PDA beads as a support material and combining it with Pd nanocatalysts, thermal catalytic reactions can be enhanced through visible and near-infrared light illumination.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Shannon E. Moran, Isaac R. Bruss, Philipp W. A. Schoenhoefer, Sharon C. Glotzer
Summary: This study conducts a systematic computational investigation on the impact of anisotropy in shape and active force director on the collective behavior of a two-dimensional active colloidal system. The study finds that shape and force anisotropy can affect the critical density of the system. Additionally, it observes a connection between non-equilibrium cluster structure and equilibrium behavior of self-propelled anisotropic particles.
Article
Physics, Multidisciplinary
Lijie Lei, Shuo Wang, Xinyuan Zhang, Wenjie Lai, Jinyu Wu, Yongxiang Gao
Summary: The study focused on the self-assembly of active colloidal molecules from binary mixtures of spherical particles, showing that by tuning surface parameters and size asymmetry, the structure and active dynamics of the colloidal molecules can be controlled.
Editorial Material
Multidisciplinary Sciences
Jan-Philipp Guenther, Lucy L. Fillbrook, Thomas S. C. MacDonald, Gueter Majer, William S. Price, Peer Fischer, Jonathon E. Beves
Summary: The apparent boosted mobility observed by Wang et al. is a known artifact caused by changing signal intensities during NMR diffusion measurements. The use of monotonically increasing gradient amplitudes leads to erroneous diffusion coefficients, while no boosted molecular mobility is observed when shuffled gradient amplitudes are applied.
Review
Chemistry, Multidisciplinary
Hannah-Noa Barad, Hyunah Kwon, Mariana Alarcon-Correa, Peer Fischer
Summary: This article reviews parallel methods for large-area nanopatterning, highlighting the materials and applications involved in each method, emphasizing the maximum pattern area and particle spacing. It also discusses the advantages, disadvantages, and challenges that still need to be addressed in order to achieve efficient and on-demand nanopatterning on a large scale.
Editorial Material
Robotics
Peer Fischer, Bradley J. Nelson
Review
Robotics
Anzhu Gao, Robin R. Murphy, Weidong Chen, Giulio Dagnino, Peer Fischer, Maximiliano G. Gutierrez, Dennis Kundrat, Bradley J. Nelson, Naveen Shamsudhin, Hao Su, Jingen Xia, Ajmal Zemmar, Dandan Zhang, Chen Wang, Guang-Zhong Yang
Summary: Robots are being considered for managing and responding to future pandemics, covering areas such as disease prevention, monitoring, and clinical care. However, developing advanced robots that are applicable, reliable, and rapidly deployable still faces many challenges. Globally sustained efforts are needed to ensure that robots are ready to tackle future outbreaks at any time.
Article
Chemistry, Physical
Vincent Mauricio Kadiri, Jan-Philipp Guenther, Sai Nikhilesh Kottapalli, Rahul Goyal, Florian Peter, Mariana Alarcon-Correa, Kwanghyo Son, Hannah-Noa Barad, Michael Boersch, Peer Fischer
Summary: The study introduces externally controlled microswimmers with FePt coatings that are biocompatible and can be tailored for propulsion in low Reynolds number environments. The hard magnetic properties of L1(0) FePt are beneficial for helical micropropellers propelled by rotating magnetic fields. Additionally, the FePt coatings are catalytically active and can be used to create light-actuated and magnetically guided Janus microswimmers.
EUROPEAN PHYSICAL JOURNAL E
(2021)
Editorial Material
Chemistry, Physical
Lucy L. Fillbrook, Jan-Philipp Gunther, Gunter Majer, William S. Price, Peer Fischer, Jonathon E. Beves
Summary: The study reported errors in data analysis and interpretation in a report of boosted mobility measured by diffusion NMR experiments. Upon reanalyzing the same data, no evidence of boosted mobility was found, and several sources of error were identified.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Athanasios G. Athanassiadis, Zhichao Ma, Nicolas Moreno-Gomez, Kai Melde, Eunjin Choi, Rahul Goyal, Peer Fischer
Summary: Smart materials can utilize ultrasound to control and initiate physical and chemical systems with high specificity. The emerging techniques in this field offer great potential for the development of smart capabilities supported by ultrasound, while also raising interesting questions for further research.
Article
Chemistry, Multidisciplinary
Lucy L. Fillbrook, Jan-Philipp Guenther, Gunter Majer, Daniel J. O'Leary, William S. Price, Hal Van Ryswyk, Peer Fischer, Jonathon E. Beves
Summary: This study shows that the changes in diffusion of small molecules during reactions are actually attributed to changing concentrations of paramagnetic ions, rather than increased mobility. The authors introduce simple methods to overcome erroneous diffusion coefficient measurements caused by changing NMR signal intensities due to paramagnetic ions. Through experiments, they demonstrate the accuracy and reliability of these methods.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Editorial Material
Robotics
Guang-Zhong Yang, Steven H. Collins, Paolo Dario, Peer Fischer, Ken Goldberg, Cecilia Laschi, Marcia K. McNutt
Review
Chemistry, Multidisciplinary
Jang-Hwan Han, Doeun Kim, Juhwan Kim, Gyurin Kim, Peer Fischer, Hyeon-Ho Jeong
Summary: Physical shadow growth is a vacuum deposition technique that allows the fabrication of various 3D-shaped nanoparticles and structures using a wide range of materials. Recent advancements in controlling the shadow effect at the nanoscale has expanded the capabilities of nanomaterials to include complex 3D-shaped hybrid nanoparticles and structures. By engineering the shape and material composition, plasmonically active nanomaterials with unique physical and chemical properties can be created. This review discusses the recent progress in the development of shadow growth techniques for hybrid plasmonic nanomaterials, describing how fabrication enables engineered material responses and highlighting novel functions. Potential applications in photonic devices, biomedicine, and chiral spectroscopy are also discussed.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
X. Garcia-Santiago, M. Hammerschmidt, J. Sachs, S. Burger, H. Kwon, M. Knoeller, T. Arens, P. Fischer, I Fernandez-Corbaton, C. Rockstuhl
Summary: Designing objects with predefined optical properties is crucial for nanophotonics. This article proposes a method to measure electromagnetic chirality and optimize the shape of silver helices to maximize it. Theoretical designs achieve high electromagnetic chirality at specific frequencies, but performance decreases in the optical band.
Letter
Chemistry, Multidisciplinary
Jan-Philipp Guenther, Lucy L. Fillbrook, Guenter Majer, Daniel J. O'Leary, William S. Price, Hal Van Ryswyk, Peer Fischer, Jonathon E. Beves
Article
Chemistry, Physical
Ida Bochert, Jan-Philipp Guenther, Peer Fischer, Guenter Majer
Summary: This study investigated the diffusion mechanism of DNA in agarose gels using experiments and simulations. The results indicate that the presence of agarose gel reduces the diffusion coefficient of DNA due to the temporary adhesion of DNA molecules to the gel fibers. The binding enthalpies of DNA strands to gel fibers, which involve van der Waals interactions and hydrogen bonding, contribute to the decreased diffusion of DNA in agarose gels.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Lucy L. Fillbrook, Jan-Philipp Gunther, Gunter Majer, Daniel J. O'Leary, William S. Price, Hal Van Ryswyk, Peer Fischer, Jonathon E. Beves
Summary: This comment responds to the debate on the diffusion of molecules during a copper-catalyzed click reaction and emphasizes that no diffusion enhancement was observed. The study shows that the relaxation agent, gradient pulse length, and diffusion time do not affect the diffusion coefficients, and the use of hydrazine as a reducing agent completely removes peak overlap. Furthermore, the authors argue that the steady-state assumption is not suitable for diffusion measurements that take several minutes.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Physics, Multidisciplinary
Rahul Goyal, Athanasios G. Athanassiadis, Zhichao Ma, Peer Fischer
Summary: Manipulation of macroscale objects by sound is limited by wavelength and object size. However, by patterning bubbles into arrays, we can amplify scattering forces and achieve precise assembly and manipulation of large objects. These results have significant implications for using secondary Bjerknes forces to control macroscale structures.
PHYSICAL REVIEW LETTERS
(2022)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
